Properties of the Number 31291

Thirty-One Thousand Two Hundred Ninety-One

Basics

Value: 31290 → 31291 → 31292

Parity: odd

Prime: No

Previous Prime: 31277

Next Prime: 31307

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 13 × 29 × 83

Divisors: 1, 13, 29, 83, 377, 1079, 2407, 31291

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101000111011

Octal: 75073

Duodecimal: 16137

Hexadecimal: 7a3b

Square: 979126681

Square Root: 176.8926227969951

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Coefficients in an asymptotic expansion of sequence A259472. A261214

Composite numbers k such that k is a substring of A067599(k). A390475

G.f. A(x) satisfies: A(x) = 1 + x + x² * A(x/(1 - x)) / (1 - x)⁴. A351283

Numerators of the partial sums of the reciprocals of the Dedekind ψ function (A001615). A357818

Position of n-th 4 in A007376. A31291

Coefficients in an asymptotic expansion of A003319(n)/n! in falling factorials. A259472